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Eyeing the overlooked in obesity fight

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As obesity rates soar worldwide, the antidote may seem obvious: Eat less! Move more! But the common-sense approach hasn’t been terribly effective, prompting some scientists to question the simplicity of the formula. Although personal decisions and self-control certainly play a large role in weight gain, a burgeoning area of research suggests that other factors, from air pollution to sleep deprivation, might be subtly helping humans pack on the pounds.

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